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| Cfletch | 
			
			  Nov 2 2025, 07:52 PM
			
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        		 Member ![]() ![]() Group: Members Posts: 204 Joined: 30-January 14 From: Santa Barbara Member No.: 16,941 Region Association: Southern California  | 
       
			
			 Hey there, realized I made a dumb mistake on purchasing the incorrect height air cleaner from PMO. I have standard length velocity stacks on my webers, but I purchased the short air cleaner. The issue I am running into with this is the top of the filter assemble gives basically no clearance to the top of the stack causing lack of air getting into the carbs.  
			
			
					
		Specific question related to the standard length and short length from PMO. Is the only difference between these 2 parts from them, the stud lengths that attached the of the assembly as well as the filter element itself? I would think they use the same base and top, just the filter and studs change the length? I found where I can get both to convert to the standard height, but just want to be sure. Thanks! Wanted to be clear, this is for IDA3C on a 6  | 
	
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| dtmehall | 
			
			  Nov 2 2025, 08:16 PM
			
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        		 Member ![]() ![]() Group: Members Posts: 199 Joined: 21-December 23 From: Farmington Hills, Michigan Member No.: 27,808 Region Association: Upper MidWest  | 
       
			
			 sorry, i didn't notice that you are running velocity stacks 
			
			
					
		ignore my post  | 
	
 Cfletch   PMO/Weber rainhat/filter specfic question   Nov 2 2025, 07:52 PM
 
 Cfletch   Maybe a follow up question, whats the correct size...   Nov 2 2025, 08:01 PM
 
 dtmehall   i am running weber 40idfs on my 914
here is what ...   Nov 2 2025, 08:14 PM
 
 Cfletch   Edited my post to be more specific, this is for a ...   Nov 2 2025, 09:29 PM
 
 sixnotfour   the short stacks and air filters used to be meant ...   Nov 2 2025, 09:57 PM
 
 infraredcalvin   There are short intake manifolds and short stacks/...   Nov 2 2025, 11:27 PM![]() ![]()  | 
	
 
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